Your RV will be likely a PHEV with a big honking battery and some compact generator (those inside-out rotaries look promising, or a fuel cell, even though I'm a major hydrogen skeptic).
It'll have solar on the RV roof, plus a fold-out solar array when parked (doubles as a canopy) that will provide ample power for an off-grid level of lifestyle. The EV battery doubles as a battery backup for the solar, and the PHEV hybrid range extender doubles as a backup generator.
You could even do some sort of fifth wheel + enhanced battery. Big problem with towing in an EV pickup is the range, but that's because we don't typically think about the possibility of the trailer RV having a big battery, and that can be linked to the Pickup truck's battery for enhanced all-electric range.
Communication? Starlink. In the area in the article, you don't even have trees that would intermittently block the satellite tracking.
For longer term offgrid, water collection and sanitation are the big challenges, well, and emergency services.
It's a shame the industry didn't go all-in on PHEVs when hybrids appeared ... TWENTY FIVE YEARS AGO. Five years after the Insight/Prius there should have been a plug in hybrid in every consumer segment, with subsidies to make them cheaper than pure ICE drivetrains. We would have likely electrified 60-90% of daily drive trips.
I still think an aggressive PHEV policy should complement policies for EV adoption, but I doubt automakers will invest in new hybrid drivetrains, given the choice of the massive engineering switch to EV drivetrain and a new hybrid drivetrain, most will just go EV and limp along with whatever legacy ICE drivetrains they have in the meantime.
Especially CEOs get fired if they don't adopt EV drivetrains. Hell they get fired if they don't switch over fast enough (see: VW).